Colour changing paint.

Throughout the house we have used Crown Trade paint and have been really impressed until now. Last week I went and chose three testers and when I got them back one of them didn't look like the colour on the chart. I took it back and they mixed me another tester saying that it's possible one of the colours hadn't gone in the first time. I took the tester home and despite Stu preferring the first wrongly mixed colour we decided to go for it. Friday after work I went and bought a massive tin ready to start painting today. The problem is that the paint is again a different colour. We painted the whole hall stairs and landing hoping it would dry the right colour but after a full Day painting its definitely not right and we aren't convinced. The picture top right shows all three colours which should be the same!!!
While Gem, Stu and I painted Dad has started work on thehe cellar hatch. He seems to know what he's doing so I've just left him to it. Stu has also finished grouting and silicone sealing the bathroom.
Tyler has helped paint, hoovered, made us drinks and played. When we asked him at dinner he said his pit today was all the work we have made him do - think he loved it really.